INCOME TAXES - Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
State	100	54	(822)
Total current	100us-gaap_CurrentIncomeTaxExpenseBenefit	54us-gaap_CurrentIncomeTaxExpenseBenefit	(822)us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	17,373	19,051	10,481
State	2,438	3,371	2,815
Total deferred	19,811us-gaap_DeferredIncomeTaxExpenseBenefit	22,422us-gaap_DeferredIncomeTaxExpenseBenefit	13,296us-gaap_DeferredIncomeTaxExpenseBenefit
Income taxes (benefit)	$ 19,911us-gaap_IncomeTaxExpenseBenefit	$ 22,476us-gaap_IncomeTaxExpenseBenefit	$ 12,474us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.